J. Comer, and P. J. Ortoleva. Coexistence of Twisted and Untwisted Crystals: An Impurity/Structural Order Model with Implications for Agate Patterns. American Mineralogist. 92 (11-12): 1952-1957 (2007).
J. Comer, and P. J. Ortoleva. Coexistence of Twisted and Untwisted Crystals: An Impurity/Structural Order Model with Implications for Agate Patterns. American Mineralogist. 92 (11-12): 1952-1957 (2007).